style.css

:root {
    --Red: hsl(12, 88%, 59%);
    --Blue: hsl(228, 39%, 23%);
    --Dark: hsl(227, 12%, 61%);
    --Very: hsl(233, 12%, 13%);
    --Pale: hsl(13, 100%, 96%);
    --Gray: hsl(0, 0%, 98%);
}
* {
    list-style-type: none;
}

body {
    background: url(./img/bg-tablet-pattern.svg);
    background-repeat: no-repeat;
    background-size: 800px;
    background-position: 90% -25%;
}
img {
    width: 100%;
}
.flex img {
    width: 50%;
}
.card {
    border: none;
}
.card img {
    width: 30%;
    margin-bottom: 1rem;
}
.btn {
    background-color: var(--Red);
    outline: none;
    border: none;
    border-radius: 15px;
    box-shadow: 0px 4px 4px var(--Red);
}
.number {
    border-radius: 15px;
    background-color: var(--Red);
}
.newsletter {
    background: url('./img/bg-simplify-section-desktop.svg');
    background-repeat: no-repeat;
    background-color: var(--Red);
}
.button {
    background-color: var(--Gray);
    text-decoration: none;
    color: var(--Red);
    border-radius: 15px;
}
.footer {
    background-color: var(--Blue);
}
.footer .logo {
    width: 50%;
    filter: invert(5);
    margin-bottom: 5rem;
}
.social a img {
    width: 10%;
    padding: 5px;
}
input {
    border-radius: 5px;
    outline: none;
    border: none;
}
.pra {
    color: var(--Dark);
}
.link ul li{
    margin-bottom: 0.5rem;
}
.bx{
    position: relative;
    width: 60px;
    height: 60px;
    background: url('./img/icon-close.svg');
    background-repeat: no-repeat;
    background-size: 20px;
    background-position: center;
    cursor: pointer;
}
.bx.bx-menu{
    background: url('./img/icon-hamburger.svg');
    background-repeat: no-repeat;
    background-size: 25px;
    background-position: center;
    cursor: pointer;
    
}

@media (max-width:768px) {
    .flex {
        display: flex;
        flex-direction: column-reverse;
    }
    .flex img {
        width: 100%;
    }
    .flex .text {
        font-size: 40px;
    }
    .flex p {
        font-size: 18px;
    }
    .tex {
        font-size: 20px;
        background-color: var(--Pale);
    }
    .newsletter {
        background: url('./img/bg-simplify-section-mobile.svg');
        background-repeat: no-repeat;
        background-color: var(--Red);
    }
   
}